Expert Verified Updated: March 2026

Sand Filter Weight Calculator

Calculate the required amount of silica sand or glass media based on tank diameter.

Quick Conclusion
A standard residential sand filter is usually sized by its diameter. An 18" tank needs 150 lbs of sand, a 24" tank needs 300 lbs, and a 30" tank needs 500 lbs. If using Glass Media, reduce the weight by 20% compared to silica sand.

Technical Comparison

Tank Diameter Sand Weight Freeboard Space
18 Inches 150 lbs ~10 Inches
24 Inches 300 lbs ~12 Inches
30 Inches 500 lbs ~15 Inches

Actionable Steps

Pro-Tip

The "Glass Media" Alternative: Consider upgrading to recycled glass media. Glass lasts twice as long (up to 10 years), filters down to 3-5 microns (vs 20-40 for sand), and requires 20% less weight by volume. It's the single best upgrade for an existing sand system.

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